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Proceedings of the 4th international conference on Embedded networked sensor systems
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ACM Transactions on Computer Systems (TOCS)
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DCOSS '08 Proceedings of the 4th IEEE international conference on Distributed Computing in Sensor Systems
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Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
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Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
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IEEE Network: The Magazine of Global Internetworking
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We present a new mechanism called Elon for enabling efficient and long-term reprogramming in wireless sensor networks. Elon reduces the transferred code size significantly by introducing the concept of replaceable component. It avoids the cost of hardware reboot with a novel software reboot mechanism. Moreover, it significantly prolongs the reprogrammable lifetime (i.e., the time period during which the sensor nodes can be reprogrammed) by avoiding flash writes for TelosB nodes. Experimental results show that Elon transfers up to 120--389 times less information than Deluge, and 18--42 times less information than Stream. The software reboot mechanism that Elon applies reduces the rebooting cost by 50.4%--53.87% in terms of beacon packets, and 56.83% in terms of unsynchronized nodes. In addition, Elon prolongs the reprogrammable lifetime by a factor of 3.3.